[1.7.x] Clarified that LocMemCache is per-process; refs #7639.
[1.7.x] Clarified that LocMemCache is per-process; refs #7639.

Thanks projectgus for the suggestion.

Backport of c37000ab04 from master

oscaro/django,jyotsna1820/django,jyotsna1820/django,oscaro/django,oscaro/django,jyotsna1820/django,jyotsna1820/django,oscaro/django